摘要
在隧道、井巷反射地震超前探测(TRSP)观测系统的基础上,依据几何地震学原理,重点研究了隧道情况下,地震波的时距曲线关系,借助绕射叠加原理,实现了直接从时间域到空间域的深度偏移成像,分析了成像运算量的影响因素,并对速度分析和深度偏移成像计算分别采用不同精度的剖分网格,同时引入插值技术,通过模型和实际资料处理验证,在不影响成像精度的情况下,可大量节省运算时间,成像效果良好.
Based on TRSP geometry system and according to the theory of geometric seismology, studied mainly on the time travel curve under the condition of tunnel. With the diffraction stacking technique, realized the depth migration imaging from time domain to space domain, analyzed the affecting factors of the imaging calculation, and adopted different accuracy division technique and interpolation technique for velocity analysis and depth migration imaging. According to the tests of the synthetic model and real data, it costs shorter calculation time with keeping the same precision, and obtains good effect.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2009年第3期298-304,共7页
Journal of China Coal Society
基金
交通部科技基金资助项目(200731881262)
陕西省科学基础研究计划基金资助项目(2007D04)
关键词
隧道
反射地震波法
超前预报
偏移成像
绕射叠加
tunnel
seismic reflection method
prediction ahead
migration imaging
diffraction stacking
